Agilent Technologies J3916A Encapsulation, Equipment Build Out, Errored Seconds, Ethernet

Glossary

Encapsulation

The processing of wrapping data with a new protocol header for transmission over the network.

Equipment

T1 and E1 equivalent of DTE. Also, the data signal generated by the user.

Equipment Build Out

This is an option used to set the transmitter signal level and pulse shape to match the length of cable to the first repeater on the network.

Errored Seconds

Tells how many of the elapsed seconds had errors.

ESF (Extended Superframe Format)

An Extended Superframe consists of 24 frames with 193 bits each. One of the 193 bits is used for framing and called the framing bit. In ESF, not all of the framing bits (24) are needed. Six of these framing bits are used for framing, six are used for a CRC, and the remaining 12 bits make up a data link for control and maintenance.

Ethernet

A LAN developed by Xerox Corp., Digital Equipment Corp., and Intel Corp. It uses the CSMA/CD method of access and transmits at 10 Mbit/s on a bus topology. The IEEE 802.3 standard evolved from Ethernet, but they are not exactly the same. Network devices based on both standards can co-exist on the same medium, but they cannot exchange data directly without special, bilingual software that can decode packets of both types.

EtherTwist

The Hewlett-Packard Company’s version of 10Base-T.

Extended LAN

A network consisting of two or more LANs that are connected by bridges, routers, or other similar devices. Resources on the LANs can be accessed by users on any of the LANs. See also LAN.

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